在列出节点时,go-client出现未定义错误。

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英文:

Undefined error in go-client when listing the nodes

问题

我是你的中文翻译助手,以下是翻译好的内容:

我刚开始学习golang,并尝试使用client-go列出我的minikube集群中的节点。但是我遇到了以下问题:

> nodeList.Items未定义(类型*无效类型没有字段或方法Items)compilerMissingFieldOrMethod

以下是我用于此问题的代码片段:

  1. package main
  2. import (
  3. "context"
  4. "fmt"
  5. metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  6. "k8s.io/client-go/kubernetes"
  7. "k8s.io/client-go/tools/clientcmd"
  8. )
  9. func main() {
  10. rules := clientcmd.NewDefaultClientConfigLoadingRules()
  11. kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, &clientcmd.ConfigOverrides{})
  12. config, err := kubeconfig.ClientConfig()
  13. if err != nil {
  14. panic(err)
  15. }
  16. clientset := kubernetes.NewForConfigOrDie(config)
  17. nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  18. if err != nil {
  19. panic(err)
  20. }
  21. for _, node := range nodeList.Items {
  22. fmt.Printf("%s\n", node.Name)
  23. }
  24. }

有人可以帮我看看问题出在哪里吗?

谢谢!

英文:

I am new to golang and I am trying to list the nodes in my minikube cluster with the client-go. And I encounter the following issue:

>nodeList.Items undefined (type *invalid type has no field or method Items)compilerMissingFieldOrMethod

And here's my code snippet for this:

  1. package main
  2. import (
  3. "context"
  4. "fmt"
  5. metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  6. "k8s.io/client-go/kubernetes"
  7. "k8s.io/client-go/tools/clientcmd"
  8. )
  9. func main() {
  10. rules := clientcmd.NewDefaultClientConfigLoadingRules()
  11. kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, &clientcmd.ConfigOverrides{})
  12. config, err := kubeconfig.ClientConfig()
  13. if err != nil {
  14. panic(err)
  15. }
  16. clientset := kubernetes.NewForConfigOrDie(config)
  17. nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  18. if err != nil {
  19. panic(err)
  20. }
  21. for _, node := range nodeList.Items {
  22. fmt.Printf("%s\n", node.Name)
  23. }
  24. }

Can someone help me what is the problem here?

Thank you!

答案1

得分: 1

看起来你的clientset没有从你的kubeconfig文件中创建。我建议你按照以下方式创建clientset。我在这里使用了集群外配置来创建clientset。你也可以使用InclusterConfig来创建它。

  1. package main
  2. import (
  3. "context"
  4. "flag"
  5. "fmt"
  6. "k8s.io/client-go/kubernetes"
  7. "k8s.io/client-go/util/homedir"
  8. "path/filepath"
  9. metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  10. "k8s.io/client-go/tools/clientcmd"
  11. )
  12. func main() {
  13. // 解析.kubeconfig文件
  14. var kubeconfig *string
  15. if home := homedir.HomeDir(); home != "" {
  16. kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) kubeconfig文件的绝对路径")
  17. } else {
  18. kubeconfig = flag.String("kubeconfig", "", "kubeconfig文件的绝对路径")
  19. }
  20. flag.Parse()
  21. config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
  22. if err != nil {
  23. panic(err)
  24. }
  25. // 创建clientset
  26. clientset, err := kubernetes.NewForConfig(config)
  27. if err != nil {
  28. panic(err)
  29. }
  30. nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  31. if err != nil {
  32. panic(err)
  33. }
  34. for _, node := range nodeList.Items {
  35. fmt.Printf("%s\n", node.Name)
  36. }
  37. }
英文:

It looks like the clientset is not created from your kubeconfig. I would suggest you to create the clientset in the following way. I have used out of cluster config here to create the clientset. You can also create it using InclusterConfig.

  1. package main
  2. import (
  3. "context"
  4. "flag"
  5. "fmt"
  6. "k8s.io/client-go/kubernetes"
  7. "k8s.io/client-go/util/homedir"
  8. "path/filepath"
  9. metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  10. "k8s.io/client-go/tools/clientcmd"
  11. )
  12. func main() {
  13. // parse the .kubeconfig file
  14. var kubeconfig *string
  15. if home := homedir.HomeDir(); home != "" {
  16. kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
  17. } else {
  18. kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
  19. }
  20. flag.Parse()
  21. config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
  22. if err != nil {
  23. panic(err)
  24. }
  25. // create the clientset
  26. clientset, err := kubernetes.NewForConfig(config)
  27. if err != nil {
  28. panic(err)
  29. }
  30. nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  31. if err != nil {
  32. panic(err)
  33. }
  34. for _, node := range nodeList.Items {
  35. fmt.Printf("%s\n", node.Name)
  36. }
  37. }

huangapple
  • 本文由 发表于 2022年11月17日 17:14:43
  • 转载请务必保留本文链接:https://go.coder-hub.com/74472827.html
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